Method for holding packet data protocol convergence sublayer sequence number synchronization

A packet data protocol and serial number technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of not providing lossless migration of discarding signaling, not supporting lossless migration, and unable to guarantee the synchronization of serial numbers, etc., to achieve The effect of extending the range of application

Active Publication Date: 2006-09-06
XFUSION DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art, when a discard occurs, the number of data packets sent by the sender may be more than the number of data packets received by the receiver. Although the above-mentioned explicit discard signaling is stipulated in the prior art protocol, it does not prov...

Method used

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  • Method for holding packet data protocol convergence sublayer sequence number synchronization
  • Method for holding packet data protocol convergence sublayer sequence number synchronization
  • Method for holding packet data protocol convergence sublayer sequence number synchronization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: The RLC and PDCP sublayer of the receiver cooperate to complete PDCP sequence number synchronization

[0032] First, add the configuration information element "Send MRW" in the RLC parameter configuration message sent by RRC (Radio Resource Controller) to the RAN and UE side. When this information element is set to TRUE, it means that when discarding occurs, send The explicit discard signaling MRW SUFI sent by the party needs to carry the RLC PDU sequence number information corresponding to the last segment of each discarded SDU.

[0033] MRW SUFI can adopt the format shown in Figure 5, where: LENGTH represents the number of SN_MRW in the current MRWSUFI; SN_MRWi represents the RLC PDU sequence number corresponding to the last segment of each discarded SDU in MRW SUFI, and Nlength and SN_MRWlength together represent the last The end position of the discarded SDU, where SN_MRWlength represents the RLC PDU sequence number corresponding to the last segment of...

Embodiment 2

[0043] Embodiment 2: The data packet carrying the PDCP serial number is sent by PDCP to complete the synchronization of the serial number

[0044] Since the PDCP sequence number can be carried in the PDCP PDU, in order to support lossless relocation in discard mode, when the sender’s RLC receives the MRW ACK SUFI returned by the receiver’s RLC, it sends a discard instruction to PDCP, requiring PDCP to send The data packet carries the corresponding PDCP sequence number. After the receiving PDCP receives the data packet with the sequence number, no matter what the currently maintained PDCP sequence number is, it will update the currently maintained PDCP according to the sequence number carried in the received PDCP PDU. PDCP sequence number.

[0045] The specific process is shown in Figure 7: After receiving the MRW SUFI, the receiving RLC submits all currently received and unsubmitted SDUs to the PDCP, and returns MRW ACK SUFI to the sending RLC. The MRWACK SUFI includes the rec...

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Abstract

A method for keeping PDCP serial number synchronizing is used for RLC works in drop mode. It contains when transmitting side RLC checks drop process, transmitting dropped SDU serial number to receiving side RLC and receiving return response message, receiving side RLC according to said SDU serial number information to determine practical dropped SDU total number and transmitting to receiving side PDCP, receiving side PDCP directly increasing said number to current PDCP serial number. Said SDU serial number information includes each to be dropped SDU serial number information current dropped process, said serial number information is each SDU last section corresponded RLC PDU serial number and transmitted through display drop signalling. Said invented method supports non destructive migration in RLC working in drop mode.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for keeping PDCP serial number synchronization in RLC discarding mode in Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access) air interface technology. Background technique [0002] Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System) is a third-generation mobile communication system that adopts Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access) air interface technology, and is also commonly referred to as a WCDMA communication system. The WCDMA communication system includes a radio access network (RAN, Radio Access Network) and a core network (CN, Core Network). Among them, the RAN implements all wireless-related functions, and is generally also called Universal Terrestrial Radio Access Network (UTRAN, Universal Terrestrial Radio Access Network). The wirele...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L12/755
Inventor 汤正华
Owner XFUSION DIGITAL TECH CO LTD
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